Hi Bryan,To look at:When an undocked window of FS2Crew is dragged back from the 2nd monitor back to the 1st monitor, the panel turns into black and FSX crashes with "A fatal error occured"Edit: I thought, let's try it to panels of PMDG 737 and the same error occured. Never had that problem before. Frans

Hi Frans,Undocking and dragging FS2Crew panels to my other monitor works for me.Maybe a video card issue?

Hi Bryan,I found it by accident. The issue is on both computers with different videocards.Try this: undock a panel and drag it to the 2nd screen.Don't resize it!Drag it back to the 1st screen........When you resize the panel (I did that always) there is no problem, so I can live with it. Edit: ahhh... and the panels of FS2Crew cannot be resized!Frans

Glad you appear to have it sorted.Cheers,